91356420 has 24 divisors (see below), whose sum is σ = 255798144. Its totient is φ = 24361696.

The previous prime is 91356413. The next prime is 91356439. The reversal of 91356420 is 2465319.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 761244 + ... + 761363.

It is an arithmetic number, because the mean of its divisors is an integer number (10658256).

Almost surely, 2^91356420 is an apocalyptic number.

It is an amenable number.

91356420 is an abundant number, since it is smaller than the sum of its proper divisors (164441724).

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

91356420 is a wasteful number, since it uses less digits than its factorization.

91356420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522619 (or 1522617 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 91356420 is about 9558.0552415227. The cubic root of 91356420 is about 450.3806162503.

The spelling of 91356420 in words is "ninety-one million, three hundred fifty-six thousand, four hundred twenty".