49157640 has 96 divisors (see below), whose sum is σ = 182594880. Its totient is φ = 11235456.

The previous prime is 49157627. The next prime is 49157653. The reversal of 49157640 is 4675194.

49157640 is a `hidden beast` number, since 4 + 9 + 1 + 5 + 7 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (49157627) and next prime (49157653).

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

It is a junction number, because it is equal to n+sod(n) for n = 49157595 and 49157604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7234 + ... + 12273.

It is an arithmetic number, because the mean of its divisors is an integer number (1902030).

Almost surely, 2^49157640 is an apocalyptic number.

49157640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49157640 is an abundant number, since it is smaller than the sum of its proper divisors (133437240).

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

49157640 is a wasteful number, since it uses less digits than its factorization.

49157640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19531 (or 19524 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 49157640 is about 7011.2509582813. The cubic root of 49157640 is about 366.3225679066.

The spelling of 49157640 in words is "forty-nine million, one hundred fifty-seven thousand, six hundred forty".