90451944 has 64 divisors (see below), whose sum is σ = 274104000. Its totient is φ = 27408960.

The previous prime is 90451937. The next prime is 90451969. The reversal of 90451944 is 44915409.

It is a happy number.

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 = 90451899 and 90451908.

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, 16659 + ... + 21410.

It is an arithmetic number, because the mean of its divisors is an integer number (4282875).

Almost surely, 2^90451944 is an apocalyptic number.

It is an amenable number.

90451944 is an abundant number, since it is smaller than the sum of its proper divisors (183652056).

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

90451944 is a wasteful number, since it uses less digits than its factorization.

90451944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38095 (or 38085 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 90451944 is about 9510.6226925475. The cubic root of 90451944 is about 448.8893499362.

The spelling of 90451944 in words is "ninety million, four hundred fifty-one thousand, nine hundred forty-four".