278880402 has 16 divisors (see below), whose sum is σ = 575753472. Its totient is φ = 89961360.

The previous prime is 278880383. The next prime is 278880421. The reversal of 278880402 is 204088872.

It is an interprime number because it is at equal distance from previous prime (278880383) and next prime (278880421).

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, 749493 + ... + 749864.

It is an arithmetic number, because the mean of its divisors is an integer number (35984592).

Almost surely, 2^278880402 is an apocalyptic number.

278880402 is an abundant number, since it is smaller than the sum of its proper divisors (296873070).

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

278880402 is a wasteful number, since it uses less digits than its factorization.

278880402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499393.

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 278880402 is about 16699.7126322581. The cubic root of 278880402 is about 653.3401259764.

The spelling of 278880402 in words is "two hundred seventy-eight million, eight hundred eighty thousand, four hundred two".