139145340 has 48 divisors (see below), whose sum is σ = 412528032. Its totient is φ = 34922496.

The previous prime is 139145311. The next prime is 139145351. The reversal of 139145340 is 43541931.

It is a super-2 number, since 2×139145340² = 38722851287431200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 139145298 and 139145307.

It is a congruent number.

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, 67189 + ... + 69228.

It is an arithmetic number, because the mean of its divisors is an integer number (8594334).

Almost surely, 2^139145340 is an apocalyptic number.

139145340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139145340 is an abundant number, since it is smaller than the sum of its proper divisors (273382692).

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

139145340 is a wasteful number, since it uses less digits than its factorization.

139145340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136446 (or 136444 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 139145340 is about 11795.9883011132. The cubic root of 139145340 is about 518.1906296384.

The spelling of 139145340 in words is "one hundred thirty-nine million, one hundred forty-five thousand, three hundred forty".