139225464 has 288 divisors, whose sum is σ = 483724800. Its totient is φ = 35925120.

The previous prime is 139225453. The next prime is 139225501. The reversal of 139225464 is 464522931.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2077959 + ... + 2078025.

It is an arithmetic number, because the mean of its divisors is an integer number (1679600).

Almost surely, 2^139225464 is an apocalyptic number.

139225464 is a gapful number since it is divisible by the number (14) 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 139225464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241862400).

139225464 is an abundant number, since it is smaller than the sum of its proper divisors (344499336).

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

139225464 is a wasteful number, since it uses less digits than its factorization.

139225464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 129 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 139225464 is about 11799.3840517207. The cubic root of 139225464 is about 518.2900737140.

The spelling of 139225464 in words is "one hundred thirty-nine million, two hundred twenty-five thousand, four hundred sixty-four".