9957620 has 24 divisors (see below), whose sum is σ = 21821184. Its totient is φ = 3809696.

The previous prime is 9957613. The next prime is 9957637. The reversal of 9957620 is 267599.

It is an Ulam number.

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, 10364 + ... + 11283.

It is an arithmetic number, because the mean of its divisors is an integer number (909216).

Almost surely, 2^9957620 is an apocalyptic number.

It is an amenable number.

9957620 is an abundant number, since it is smaller than the sum of its proper divisors (11863564).

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

9957620 is a wasteful number, since it uses less digits than its factorization.

9957620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21679 (or 21677 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 9957620 is about 3155.5696791546. The cubic root of 9957620 is about 215.1386882360.

The spelling of 9957620 in words is "nine million, nine hundred fifty-seven thousand, six hundred twenty".