40306732431 has 16 divisors (see below), whose sum is σ = 61447507968. Its totient is φ = 23022021600.

The previous prime is 40306732409. The next prime is 40306732457. The reversal of 40306732431 is 13423760304.

It is not a de Polignac number, because 40306732431 - 2¹³ = 40306724239 is a prime.

It is a super-2 number, since 2×40306732431² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40306732392 and 40306732401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40306732481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385455 + ... + 478736.

It is an arithmetic number, because the mean of its divisors is an integer number (3840469248).

Almost surely, 2^40306732431 is an apocalyptic number.

40306732431 is a deficient number, since it is larger than the sum of its proper divisors (21140775537).

40306732431 is a wasteful number, since it uses less digits than its factorization.

40306732431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866422.

The product of its (nonzero) digits is 36288, while the sum is 33.

The spelling of 40306732431 in words is "forty billion, three hundred six million, seven hundred thirty-two thousand, four hundred thirty-one".