156428415 has 160 divisors (see below), whose sum is σ = 342974016. Its totient is φ = 67184640.

The previous prime is 156428413. The next prime is 156428417. The reversal of 156428415 is 514824651.

It is a happy number.

156428415 is a `hidden beast` number, since 1 + 5 + 642 + 8 + 4 + 1 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (156428413) and next prime (156428417).

It is not a de Polignac number, because 156428415 - 2¹ = 156428413 is a prime.

It is a super-3 number, since 3×156428415³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 156428415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156428413) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2142819 + ... + 2142891.

Almost surely, 2^156428415 is an apocalyptic number.

156428415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

156428415 is an abundant number, since it is smaller than the sum of its proper divisors (186545601).

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

156428415 is a wasteful number, since it uses less digits than its factorization.

156428415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 142 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 156428415 is about 12507.1345639199. The cubic root of 156428415 is about 538.8135990437.

The spelling of 156428415 in words is "one hundred fifty-six million, four hundred twenty-eight thousand, four hundred fifteen".