510742978 has 4 divisors (see below), whose sum is σ = 766114470. Its totient is φ = 255371488.

The previous prime is 510742957. The next prime is 510742997. The reversal of 510742978 is 879247015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 403889409 + 106853569 = 20097^2 + 10337^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127685743 + ... + 127685746.

Almost surely, 2^510742978 is an apocalyptic number.

510742978 is a deficient number, since it is larger than the sum of its proper divisors (255371492).

510742978 is a wasteful number, since it uses less digits than its factorization.

510742978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255371491.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 510742978 is about 22599.6234039419. The cubic root of 510742978 is about 799.3447645213.

The spelling of 510742978 in words is "five hundred ten million, seven hundred forty-two thousand, nine hundred seventy-eight".