40266397 has 12 divisors (see below), whose sum is σ = 42097440. Its totient is φ = 38505456.

The previous prime is 40266389. The next prime is 40266403. The reversal of 40266397 is 79366204.

It is not a de Polignac number, because 40266397 - 2³ = 40266389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40266337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91504 + ... + 91942.

It is an arithmetic number, because the mean of its divisors is an integer number (3508120).

Almost surely, 2^40266397 is an apocalyptic number.

It is an amenable number.

40266397 is a deficient number, since it is larger than the sum of its proper divisors (1831043).

40266397 is an equidigital number, since it uses as much as digits as its factorization.

40266397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 40266397 is about 6345.5809032743. The cubic root of 40266397 is about 342.7527308632.

The spelling of 40266397 in words is "forty million, two hundred sixty-six thousand, three hundred ninety-seven".