49891830 has 32 divisors (see below), whose sum is σ = 124948224. Its totient is φ = 12725856.

The previous prime is 49891819. The next prime is 49891843. The reversal of 49891830 is 3819894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35464 + ... + 36843.

It is an arithmetic number, because the mean of its divisors is an integer number (3904632).

Almost surely, 2^49891830 is an apocalyptic number.

49891830 is an abundant number, since it is smaller than the sum of its proper divisors (75056394).

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

49891830 is a wasteful number, since it uses less digits than its factorization.

49891830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72340.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 49891830 is about 7063.4148964931. The cubic root of 49891830 is about 368.1372902601.

It can be divided in two parts, 49891 and 830, that added together give a triangular number (50721 = T₃₁₈).

The spelling of 49891830 in words is "forty-nine million, eight hundred ninety-one thousand, eight hundred thirty".