278890002 has 24 divisors (see below), whose sum is σ = 618315984. Its totient is φ = 90801144.

The previous prime is 278889983. The next prime is 278890021. The reversal of 278890002 is 200098872.

It is an interprime number because it is at equal distance from previous prime (278889983) and next prime (278890021).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179388 + ... + 180935.

It is an arithmetic number, because the mean of its divisors is an integer number (25763166).

Almost surely, 2^278890002 is an apocalyptic number.

278890002 is an abundant number, since it is smaller than the sum of its proper divisors (339425982).

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

278890002 is a wasteful number, since it uses less digits than its factorization.

278890002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360374 (or 360371 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 278890002 is about 16700.0000598802. Note that the first 4 decimals coincide. The cubic root of 278890002 is about 653.3476226108.

The spelling of 278890002 in words is "two hundred seventy-eight million, eight hundred ninety thousand, two".