91356040 has 32 divisors (see below), whose sum is σ = 208926360. Its totient is φ = 35942400.

The previous prime is 91356029. The next prime is 91356091. The reversal of 91356040 is 4065319.

It can be written as a sum of positive squares in 4 ways, for example, as 49028004 + 42328036 = 7002^2 + 6506^2 .

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, 16281 + ... + 21160.

Almost surely, 2^91356040 is an apocalyptic number.

It is an amenable number.

91356040 is an abundant number, since it is smaller than the sum of its proper divisors (117570320).

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

91356040 is a wasteful number, since it uses less digits than its factorization.

91356040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37513 (or 37509 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 91356040 is about 9558.0353629812. The cubic root of 91356040 is about 450.3799917919.

It can be divided in two parts, 913 and 56040, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 91356040 in words is "ninety-one million, three hundred fifty-six thousand, forty".