139180420 has 24 divisors (see below), whose sum is σ = 292753944. Its totient is φ = 55581696.

The previous prime is 139180417. The next prime is 139180427. The reversal of 139180420 is 24081931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1258884 + 137921536 = 1122^2 + 11744^2 .

It is a super-2 number, since 2×139180420² = 38742378622752800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139180427) 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, 7732 + ... + 18388.

It is an arithmetic number, because the mean of its divisors is an integer number (12198081).

Almost surely, 2^139180420 is an apocalyptic number.

139180420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139180420 is an abundant number, since it is smaller than the sum of its proper divisors (153573524).

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

139180420 is a wasteful number, since it uses less digits than its factorization.

139180420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11319 (or 11317 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 139180420 is about 11797.4751536081. The cubic root of 139180420 is about 518.2341730773.

The spelling of 139180420 in words is "one hundred thirty-nine million, one hundred eighty thousand, four hundred twenty".