402739938 has 48 divisors (see below), whose sum is σ = 907976160. Its totient is φ = 133793856.

The previous prime is 402739937. The next prime is 402739943. The reversal of 402739938 is 839937204.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 402739893 and 402739902.

It is not an unprimeable number, because it can be changed into a prime (402739937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162553 + ... + 165011.

It is an arithmetic number, because the mean of its divisors is an integer number (18916170).

Almost surely, 2^402739938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402739938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453988080).

402739938 is an abundant number, since it is smaller than the sum of its proper divisors (505236222).

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

402739938 is a wasteful number, since it uses less digits than its factorization.

402739938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813 (or 2801 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 402739938 is about 20068.3815490936. The cubic root of 402739938 is about 738.4848093478.

The spelling of 402739938 in words is "four hundred two million, seven hundred thirty-nine thousand, nine hundred thirty-eight".