36428139 has 24 divisors (see below), whose sum is σ = 57895344. Its totient is φ = 22070400.

The previous prime is 36428137. The next prime is 36428143. The reversal of 36428139 is 93182463.

36428139 is a `hidden beast` number, since 3 + 642 + 8 + 1 + 3 + 9 = 666.

It is not a de Polignac number, because 36428139 - 2¹ = 36428137 is a prime.

It is a super-2 number, since 2×36428139² = 2654018622006642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36428137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10459 + ... + 13499.

It is an arithmetic number, because the mean of its divisors is an integer number (2412306).

Almost surely, 2^36428139 is an apocalyptic number.

36428139 is a deficient number, since it is larger than the sum of its proper divisors (21467205).

36428139 is a wasteful number, since it uses less digits than its factorization.

36428139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080 (or 3055 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 36428139 is about 6035.5727980035. The cubic root of 36428139 is about 331.4965363438.

It can be divided in two parts, 3642 and 8139, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 36428139 in words is "thirty-six million, four hundred twenty-eight thousand, one hundred thirty-nine".