49145520 has 80 divisors (see below), whose sum is σ = 153284832. Its totient is φ = 13025280.

The previous prime is 49145519. The next prime is 49145527. The reversal of 49145520 is 2554194.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (49145527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45790 + ... + 46850.

Almost surely, 2^49145520 is an apocalyptic number.

49145520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49145520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76642416).

49145520 is an abundant number, since it is smaller than the sum of its proper divisors (104139312).

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

49145520 is a wasteful number, since it uses less digits than its factorization.

49145520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 49145520 is about 7010.3865799255. The cubic root of 49145520 is about 366.2924593656.

The spelling of 49145520 in words is "forty-nine million, one hundred forty-five thousand, five hundred twenty".