44477991 has 12 divisors (see below), whose sum is σ = 66625832. Its totient is φ = 29651832.

The previous prime is 44477981. The next prime is 44478023. The reversal of 44477991 is 19977444.

It is not a de Polignac number, because 44477991 - 2⁷ = 44477863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44477921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91276 + ... + 91761.

Almost surely, 2^44477991 is an apocalyptic number.

44477991 is a deficient number, since it is larger than the sum of its proper divisors (22147841).

44477991 is an equidigital number, since it uses as much as digits as its factorization.

44477991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183052 (or 183040 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 44477991 is about 6669.1821837464. The cubic root of 44477991 is about 354.3086219842.

The spelling of 44477991 in words is "forty-four million, four hundred seventy-seven thousand, nine hundred ninety-one".