340797978 has 12 divisors (see below), whose sum is σ = 738395658. Its totient is φ = 113599320.

The previous prime is 340797959. The next prime is 340797991. The reversal of 340797978 is 879797043.

It can be written as a sum of positive squares in only one way, i.e., 295599249 + 45198729 = 17193^2 + 6723^2 .

It is a super-2 number, since 2×340797978² = 232286523617776968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9466593 + ... + 9466628.

Almost surely, 2^340797978 is an apocalyptic number.

340797978 is an abundant number, since it is smaller than the sum of its proper divisors (397597680).

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

340797978 is a wasteful number, since it uses less digits than its factorization.

340797978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18933229 (or 18933226 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The square root of 340797978 is about 18460.7144498798. The cubic root of 340797978 is about 698.4988087587.

The spelling of 340797978 in words is "three hundred forty million, seven hundred ninety-seven thousand, nine hundred seventy-eight".