40263479 has 4 divisors (see below), whose sum is σ = 40327920. Its totient is φ = 40199040.

The previous prime is 40263407. The next prime is 40263481. The reversal of 40263479 is 97436204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40263479 is a prime.

It is a super-2 number, since 2×40263479² = 3242295482366882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40262479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31274 + ... + 32535.

It is an arithmetic number, because the mean of its divisors is an integer number (10081980).

Almost surely, 2^40263479 is an apocalyptic number.

40263479 is a deficient number, since it is larger than the sum of its proper divisors (64441).

40263479 is an equidigital number, since it uses as much as digits as its factorization.

40263479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64440.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 40263479 is about 6345.3509753204. The cubic root of 40263479 is about 342.7444511999.

The spelling of 40263479 in words is "forty million, two hundred sixty-three thousand, four hundred seventy-nine".