428265037215 has 32 divisors (see below), whose sum is σ = 773841393600. Its totient is φ = 224663621760.

The previous prime is 428265037201. The next prime is 428265037217. The reversal of 428265037215 is 512730562824.

428265037215 is a `hidden beast` number, since 4 + 2 + 8 + 265 + 0 + 372 + 15 = 666.

It is not a de Polignac number, because 428265037215 - 2⁴ = 428265037199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428265037217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25994500 + ... + 26010969.

It is an arithmetic number, because the mean of its divisors is an integer number (24182543550).

Almost surely, 2^428265037215 is an apocalyptic number.

428265037215 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

428265037215 is a deficient number, since it is larger than the sum of its proper divisors (345576356385).

428265037215 is a wasteful number, since it uses less digits than its factorization.

428265037215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52005544 (or 52005538 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 428265037215 in words is "four hundred twenty-eight billion, two hundred sixty-five million, thirty-seven thousand, two hundred fifteen".