1672636 has 48 divisors (see below), whose sum is σ = 3612672. Its totient is φ = 662400.

The previous prime is 1672631. The next prime is 1672637. The reversal of 1672636 is 6362761.

It is a super-2 number, since 2×1672636² = 5595422376992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 1672598 and 1672607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35565 + ... + 35611.

It is an arithmetic number, because the mean of its divisors is an integer number (75264).

2^1672636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1672636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1806336).

1672636 is an abundant number, since it is smaller than the sum of its proper divisors (1940036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1672636 is a wasteful number, since it uses less digits than its factorization.

1672636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 128 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The square root of 1672636 is about 1293.3042952067. The cubic root of 1672636 is about 118.7044900401.

1672636 divided by its sum of digits (31) gives a triangular number (53956 = T₃₂₈).

The spelling of 1672636 in words is "one million, six hundred seventy-two thousand, six hundred thirty-six".