139151940 has 48 divisors (see below), whose sum is σ = 390207552. Its totient is φ = 37051776.

The previous prime is 139151921. The next prime is 139151951. The reversal of 139151940 is 49151931.

139151940 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

139151940 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53142 + ... + 55698.

It is an arithmetic number, because the mean of its divisors is an integer number (8129324).

Almost surely, 2^139151940 is an apocalyptic number.

139151940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139151940 is an abundant number, since it is smaller than the sum of its proper divisors (251055612).

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

139151940 is a wasteful number, since it uses less digits than its factorization.

139151940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476 (or 3474 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 139151940 is about 11796.2680539228. The cubic root of 139151940 is about 518.1988225204.

Subtracting from 139151940 its reverse (49151931), we obtain a palindrome (90000009).

The spelling of 139151940 in words is "one hundred thirty-nine million, one hundred fifty-one thousand, nine hundred forty".