90430400 has 42 divisors (see below), whose sum is σ = 222519240. Its totient is φ = 36171520.

The previous prime is 90430393. The next prime is 90430423. The reversal of 90430400 is 403409.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26660 + ... + 29859.

Almost surely, 2^90430400 is an apocalyptic number.

It is an amenable number.

90430400 is an abundant number, since it is smaller than the sum of its proper divisors (132088840).

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

90430400 is a wasteful number, since it uses less digits than its factorization.

90430400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56541 (or 56526 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 90430400 is about 9509.4899968400. The cubic root of 90430400 is about 448.8537080265.

Adding to 90430400 its reverse (403409), we get a palindrome (90833809).

The spelling of 90430400 in words is "ninety million, four hundred thirty thousand, four hundred".