397902 has 32 divisors (see below), whose sum is σ = 870912. Its totient is φ = 120704.

The previous prime is 397897. The next prime is 397907. The reversal of 397902 is 209793.

397902 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (397897) and next prime (397907).

It is a self number, because there is not a number n which added to its sum of digits gives 397902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397907) by changing a digit.

397902 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4753 + ... + 4835.

It is an arithmetic number, because the mean of its divisors is an integer number (27216).

2³⁹⁷⁹⁰² is an apocalyptic number.

397902 is an abundant number, since it is smaller than the sum of its proper divisors (473010).

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

397902 is a wasteful number, since it uses less digits than its factorization.

397902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 397902 is about 630.7947368201. The cubic root of 397902 is about 73.5515857955.

The spelling of 397902 in words is "three hundred ninety-seven thousand, nine hundred two".