90407440 has 40 divisors (see below), whose sum is σ = 210754368. Its totient is φ = 36067200.

The previous prime is 90407417. The next prime is 90407467. The reversal of 90407440 is 4470409.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 90407399 and 90407408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34165 + ... + 36715.

Almost surely, 2^90407440 is an apocalyptic number.

It is an amenable number.

90407440 is an abundant number, since it is smaller than the sum of its proper divisors (120346928).

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

90407440 is a wasteful number, since it uses less digits than its factorization.

90407440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007 (or 3001 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 90407440 is about 9508.2827050945. The cubic root of 90407440 is about 448.8157172864.

Adding to 90407440 its reverse (4470409), we get a palindrome (94877849).

The spelling of 90407440 in words is "ninety million, four hundred seven thousand, four hundred forty".