40430372 has 12 divisors (see below), whose sum is σ = 71149680. Its totient is φ = 20101896.

The previous prime is 40430371. The next prime is 40430419. The reversal of 40430372 is 27303404.

It is a happy number.

It is a super-2 number, since 2×40430372² = 3269229960116768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40430371) 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, 27518 + ... + 28949.

It is an arithmetic number, because the mean of its divisors is an integer number (5929140).

Almost surely, 2^40430372 is an apocalyptic number.

It is an amenable number.

40430372 is a deficient number, since it is larger than the sum of its proper divisors (30719308).

40430372 is a wasteful number, since it uses less digits than its factorization.

40430372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56650 (or 56648 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 40430372 is about 6358.4881850956. The cubic root of 40430372 is about 343.2173594746.

Adding to 40430372 its reverse (27303404), we get a palindrome (67733776).

The spelling of 40430372 in words is "forty million, four hundred thirty thousand, three hundred seventy-two".