48139840 has 56 divisors (see below), whose sum is σ = 131015232. Its totient is φ = 16504320.

The previous prime is 48139837. The next prime is 48139841. The reversal of 48139840 is 4893184.

48139840 is nontrivially palindromic in base 6.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 48139840.

It is not an unprimeable number, because it can be changed into a prime (48139841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8506 + ... + 12985.

Almost surely, 2^48139840 is an apocalyptic number.

48139840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

48139840 is an abundant number, since it is smaller than the sum of its proper divisors (82875392).

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

48139840 is a wasteful number, since it uses less digits than its factorization.

48139840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21515 (or 21505 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 48139840 is about 6938.2879732683. The cubic root of 48139840 is about 363.7767015901.

The spelling of 48139840 in words is "forty-eight million, one hundred thirty-nine thousand, eight hundred forty".