139653432 has 24 divisors (see below), whose sum is σ = 378228240. Its totient is φ = 46551120.

The previous prime is 139653431. The next prime is 139653457. The reversal of 139653432 is 234356931.

It is a happy number.

139653432 is a `hidden beast` number, since 1 + 3 + 96 + 534 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139653431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 969744 + ... + 969887.

It is an arithmetic number, because the mean of its divisors is an integer number (15759510).

Almost surely, 2^139653432 is an apocalyptic number.

139653432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139653432 is an abundant number, since it is smaller than the sum of its proper divisors (238574808).

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

139653432 is a wasteful number, since it uses less digits than its factorization.

139653432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939643 (or 1939636 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 139653432 is about 11817.5053204981. The cubic root of 139653432 is about 518.8205913129.

The spelling of 139653432 in words is "one hundred thirty-nine million, six hundred fifty-three thousand, four hundred thirty-two".