139702428 has 24 divisors (see below), whose sum is σ = 362191760. Its totient is φ = 46567440.

The previous prime is 139702427. The next prime is 139702429. The reversal of 139702428 is 824207931.

It is an interprime number because it is at equal distance from previous prime (139702427) and next prime (139702429).

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

It is a junction number, because it is equal to n+sod(n) for n = 139702392 and 139702401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139702427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646663 + ... + 646878.

Almost surely, 2^139702428 is an apocalyptic number.

139702428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

139702428 is an abundant number, since it is smaller than the sum of its proper divisors (222489332).

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

139702428 is a wasteful number, since it uses less digits than its factorization.

139702428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293554 (or 1293546 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 139702428 is about 11819.5781650616. The cubic root of 139702428 is about 518.8812585449.

The spelling of 139702428 in words is "one hundred thirty-nine million, seven hundred two thousand, four hundred twenty-eight".