49139240 has 32 divisors (see below), whose sum is σ = 111646080. Its totient is φ = 19463232.

The previous prime is 49139213. The next prime is 49139243. The reversal of 49139240 is 4293194.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 49139197 and 49139206.

It is not an unprimeable number, because it can be changed into a prime (49139243) 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, 1844 + ... + 10083.

It is an arithmetic number, because the mean of its divisors is an integer number (3488940).

Almost surely, 2^49139240 is an apocalyptic number.

49139240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49139240 is an abundant number, since it is smaller than the sum of its proper divisors (62506840).

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

49139240 is a wasteful number, since it uses less digits than its factorization.

49139240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12041 (or 12037 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 49139240 is about 7009.9386587901. The cubic root of 49139240 is about 366.2768566234.

The spelling of 49139240 in words is "forty-nine million, one hundred thirty-nine thousand, two hundred forty".