40098091 has 8 divisors (see below), whose sum is σ = 44089344. Its totient is φ = 36164520.

The previous prime is 40098083. The next prime is 40098103. The reversal of 40098091 is 19089004.

40098091 = 264² + 265² + ... + 517².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40098091 - 2³ = 40098083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40098001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12955 + ... + 15748.

It is an arithmetic number, because the mean of its divisors is an integer number (5511168).

Almost surely, 2^40098091 is an apocalyptic number.

40098091 is a deficient number, since it is larger than the sum of its proper divisors (3991253).

40098091 is a wasteful number, since it uses less digits than its factorization.

40098091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28841.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 40098091 is about 6332.3053463964. The cubic root of 40098091 is about 342.2745165482.

It can be divided in two parts, 4009 and 8091, that added together give a square (12100 = 110²).

The spelling of 40098091 in words is "forty million, ninety-eight thousand, ninety-one".