402393940 has 48 divisors (see below), whose sum is σ = 911691648. Its totient is φ = 148305024.

The previous prime is 402393923. The next prime is 402393941. The reversal of 402393940 is 49393204.

402393940 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 402393896 and 402393905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402393941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192139 + ... + 194221.

It is an arithmetic number, because the mean of its divisors is an integer number (18993576).

Almost surely, 2^402393940 is an apocalyptic number.

It is an amenable number.

402393940 is an abundant number, since it is smaller than the sum of its proper divisors (509297708).

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

402393940 is a wasteful number, since it uses less digits than its factorization.

402393940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848 (or 2846 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 402393940 is about 20059.7592208880. The cubic root of 402393940 is about 738.2732688063.

The spelling of 402393940 in words is "four hundred two million, three hundred ninety-three thousand, nine hundred forty".