90403388 has 6 divisors (see below), whose sum is σ = 158205936. Its totient is φ = 45201692.

The previous prime is 90403381. The next prime is 90403421. The reversal of 90403388 is 88330409.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90403381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11300420 + ... + 11300427.

It is an arithmetic number, because the mean of its divisors is an integer number (26367656).

Almost surely, 2^90403388 is an apocalyptic number.

It is an amenable number.

90403388 is a deficient number, since it is larger than the sum of its proper divisors (67802548).

90403388 is a wasteful number, since it uses less digits than its factorization.

90403388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22600851 (or 22600849 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 90403388 is about 9508.0696253235. The cubic root of 90403388 is about 448.8090119811.

The spelling of 90403388 in words is "ninety million, four hundred three thousand, three hundred eighty-eight".