139201840 has 40 divisors (see below), whose sum is σ = 324206928. Its totient is φ = 55584000.

The previous prime is 139201823. The next prime is 139201859. The reversal of 139201840 is 48102931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 139201799 and 139201808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60715 + ... + 62965.

Almost surely, 2^139201840 is an apocalyptic number.

139201840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139201840 is an abundant number, since it is smaller than the sum of its proper divisors (185005088).

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

139201840 is a wasteful number, since it uses less digits than its factorization.

139201840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037 (or 3031 counting only the distinct ones).

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

The square root of 139201840 is about 11798.3829400473. The cubic root of 139201840 is about 518.2607572922.

It can be divided in two parts, 139201 and 840, that added together give a palindrome (140041).

The spelling of 139201840 in words is "one hundred thirty-nine million, two hundred one thousand, eight hundred forty".