424040978 has 4 divisors (see below), whose sum is σ = 636061470. Its totient is φ = 212020488.

The previous prime is 424040963. The next prime is 424040999. The reversal of 424040978 is 879040424.

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., 256416169 + 167624809 = 16013^2 + 12947^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010243 + ... + 106010246.

Almost surely, 2^424040978 is an apocalyptic number.

424040978 is a deficient number, since it is larger than the sum of its proper divisors (212020492).

424040978 is a wasteful number, since it uses less digits than its factorization.

424040978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212020491.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 424040978 is about 20592.2552917353. The cubic root of 424040978 is about 751.2813521208.

The spelling of 424040978 in words is "four hundred twenty-four million, forty thousand, nine hundred seventy-eight".