139672650 has 96 divisors (see below), whose sum is σ = 382350528. Its totient is φ = 33523200.

The previous prime is 139672627. The next prime is 139672657. The reversal of 139672650 is 56276931.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 139672599 and 139672608.

It is not an unprimeable number, because it can be changed into a prime (139672657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79077 + ... + 80823.

It is an arithmetic number, because the mean of its divisors is an integer number (3982818).

Almost surely, 2^139672650 is an apocalyptic number.

139672650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139672650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191175264).

139672650 is an abundant number, since it is smaller than the sum of its proper divisors (242677878).

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

139672650 is a wasteful number, since it uses less digits than its factorization.

139672650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816 (or 1811 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 139672650 is about 11818.3184083016. The cubic root of 139672650 is about 518.8443888824.

The spelling of 139672650 in words is "one hundred thirty-nine million, six hundred seventy-two thousand, six hundred fifty".