1626720 has 48 divisors (see below), whose sum is σ = 5125680. Its totient is φ = 433664.

The previous prime is 1626707. The next prime is 1626739. The reversal of 1626720 is 276261.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215 + ... + 2174.

It is an arithmetic number, because the mean of its divisors is an integer number (106785).

2^1626720 is an apocalyptic number.

1626720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1626720 is an abundant number, since it is smaller than the sum of its proper divisors (3498960).

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

1626720 is a wasteful number, since it uses less digits than its factorization.

1626720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407 (or 3399 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1626720 is about 1275.4293394775. The cubic root of 1626720 is about 117.6081997152.

It can be divided in two parts, 1626 and 720, that added together give a triangular number (2346 = T₆₈).

The spelling of 1626720 in words is "one million, six hundred twenty-six thousand, seven hundred twenty".