402799278 has 64 divisors (see below), whose sum is σ = 973486080. Its totient is φ = 108540000.

The previous prime is 402799237. The next prime is 402799291. The reversal of 402799278 is 872997204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199293 + ... + 201303.

It is an arithmetic number, because the mean of its divisors is an integer number (15210720).

Almost surely, 2^402799278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402799278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486743040).

402799278 is an abundant number, since it is smaller than the sum of its proper divisors (570686802).

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

402799278 is a wasteful number, since it uses less digits than its factorization.

402799278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 402799278 is about 20069.8599397206. The cubic root of 402799278 is about 738.5210771991.

The spelling of 402799278 in words is "four hundred two million, seven hundred ninety-nine thousand, two hundred seventy-eight".