69138930 has 32 divisors (see below), whose sum is σ = 189638784. Its totient is φ = 15803136.

The previous prime is 69138919. The next prime is 69138947. The reversal of 69138930 is 3983196.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164407 + ... + 164826.

It is an arithmetic number, because the mean of its divisors is an integer number (5926212).

Almost surely, 2^69138930 is an apocalyptic number.

69138930 is an abundant number, since it is smaller than the sum of its proper divisors (120499854).

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

69138930 is a wasteful number, since it uses less digits than its factorization.

69138930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329250.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 69138930 is about 8314.9822609552. The cubic root of 69138930 is about 410.4316888807.

It can be divided in two parts, 691 and 38930, that added together give a triangular number (39621 = T₂₈₁).

The spelling of 69138930 in words is "sixty-nine million, one hundred thirty-eight thousand, nine hundred thirty".