1662620 has 24 divisors (see below), whose sum is σ = 3553200. Its totient is φ = 653312.

The previous prime is 1662611. The next prime is 1662629. The reversal of 1662620 is 262661.

It is an interprime number because it is at equal distance from previous prime (1662611) and next prime (1662629).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476 + ... + 1884.

It is an arithmetic number, because the mean of its divisors is an integer number (148050).

2^1662620 is an apocalyptic number.

1662620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662620 is an abundant number, since it is smaller than the sum of its proper divisors (1890580).

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

1662620 is a wasteful number, since it uses less digits than its factorization.

1662620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477 (or 1475 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1662620 is about 1289.4262289871. The cubic root of 1662620 is about 118.4670753063.

It can be divided in two parts, 16626 and 20, that multiplied together give a triangular number (332520 = T₈₁₅).

The spelling of 1662620 in words is "one million, six hundred sixty-two thousand, six hundred twenty".