49251840 has 240 divisors, whose sum is σ = 176332464. Its totient is φ = 11714560.

The previous prime is 49251793. The next prime is 49251869. The reversal of 49251840 is 4815294.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 929254 + ... + 929306.

Almost surely, 2^49251840 is an apocalyptic number.

49251840 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 49251840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88166232).

49251840 is an abundant number, since it is smaller than the sum of its proper divisors (127080624).

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

49251840 is a wasteful number, since it uses less digits than its factorization.

49251840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 49251840 is about 7017.9655171567. The cubic root of 49251840 is about 366.5564112944.

The spelling of 49251840 in words is "forty-nine million, two hundred fifty-one thousand, eight hundred forty".