40226437987 has 4 divisors (see below), whose sum is σ = 40227153856. Its totient is φ = 40225722120.

The previous prime is 40226437981. The next prime is 40226438009. The reversal of 40226437987 is 78973462204.

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

It is a cyclic number.

It is not a de Polignac number, because 40226437987 - 2⁷ = 40226437859 is a prime.

It is a super-2 number, since 2×40226437987² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40226437981) 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, 265728 + ... + 388669.

It is an arithmetic number, because the mean of its divisors is an integer number (10056788464).

Almost surely, 2^40226437987 is an apocalyptic number.

40226437987 is a deficient number, since it is larger than the sum of its proper divisors (715869).

40226437987 is an equidigital number, since it uses as much as digits as its factorization.

40226437987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715868.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 40226437987 in words is "forty billion, two hundred twenty-six million, four hundred thirty-seven thousand, nine hundred eighty-seven".