420078715 has 36 divisors (see below), whose sum is σ = 602023968. Its totient is φ = 280449120.

The previous prime is 420078667. The next prime is 420078727. The reversal of 420078715 is 517870024.

It is a happy number.

It is not a de Polignac number, because 420078715 - 2¹³ = 420070523 is a prime.

It is a super-2 number, since 2×420078715² = 352932253592102450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2199270 + ... + 2199460.

It is an arithmetic number, because the mean of its divisors is an integer number (16722888).

Almost surely, 2^420078715 is an apocalyptic number.

420078715 is a deficient number, since it is larger than the sum of its proper divisors (181945253).

420078715 is an equidigital number, since it uses as much as digits as its factorization.

420078715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 420078715 is about 20495.8218913026. The cubic root of 420078715 is about 748.9340204494.

The spelling of 420078715 in words is "four hundred twenty million, seventy-eight thousand, seven hundred fifteen".