139402368 has 192 divisors, whose sum is σ = 467812800. Its totient is φ = 39020544.

The previous prime is 139402357. The next prime is 139402451. The reversal of 139402368 is 863204931.

It is a tau number, because it is divible by the number of its divisors (192).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 475630 + ... + 475922.

It is an arithmetic number, because the mean of its divisors is an integer number (2436525).

Almost surely, 2^139402368 is an apocalyptic number.

139402368 is a gapful number since it is divisible by the number (18) 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 139402368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233906400).

139402368 is an abundant number, since it is smaller than the sum of its proper divisors (328410432).

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

139402368 is a wasteful number, since it uses less digits than its factorization.

139402368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 364 counting only the distinct ones).

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

The square root of 139402368 is about 11806.8779954737. The cubic root of 139402368 is about 518.5094990459.

The spelling of 139402368 in words is "one hundred thirty-nine million, four hundred two thousand, three hundred sixty-eight".