40127664 has 20 divisors (see below), whose sum is σ = 103663256. Its totient is φ = 13375872.

The previous prime is 40127657. The next prime is 40127687. The reversal of 40127664 is 46672104.

It is a super-2 number, since 2×40127664² = 3220458836193792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417949 + ... + 418044.

Almost surely, 2^40127664 is an apocalyptic number.

It is an amenable number.

40127664 is an abundant number, since it is smaller than the sum of its proper divisors (63535592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40127664 is a wasteful number, since it uses less digits than its factorization.

40127664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836004 (or 835998 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 40127664 is about 6334.6400055567. The cubic root of 40127664 is about 342.3586402279.

Adding to 40127664 its reverse (46672104), we get a palindrome (86799768).

The spelling of 40127664 in words is "forty million, one hundred twenty-seven thousand, six hundred sixty-four".