139263264 has 144 divisors (see below), whose sum is σ = 465087168. Its totient is φ = 38693376.

The previous prime is 139263263. The next prime is 139263281. The reversal of 139263264 is 462362931.

139263264 is a `hidden beast` number, since 1 + 392 + 6 + 3 + 264 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (139263263) 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, 73659 + ... + 75525.

It is an arithmetic number, because the mean of its divisors is an integer number (3229772).

Almost surely, 2^139263264 is an apocalyptic number.

139263264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139263264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232543584).

139263264 is an abundant number, since it is smaller than the sum of its proper divisors (325823904).

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

139263264 is a wasteful number, since it uses less digits than its factorization.

139263264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927 (or 1916 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 139263264 is about 11800.9857215404. The cubic root of 139263264 is about 518.3369750769.

The spelling of 139263264 in words is "one hundred thirty-nine million, two hundred sixty-three thousand, two hundred sixty-four".