40001632 has 36 divisors (see below), whose sum is σ = 86571828. Its totient is φ = 18180800.

The previous prime is 40001627. The next prime is 40001641. The reversal of 40001632 is 23610004.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1294 + ... + 9037.

It is an arithmetic number, because the mean of its divisors is an integer number (2404773).

Almost surely, 2^40001632 is an apocalyptic number.

It is an amenable number.

40001632 is an abundant number, since it is smaller than the sum of its proper divisors (46570196).

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

40001632 is a wasteful number, since it uses less digits than its factorization.

40001632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10363 (or 10344 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40001632 is about 6324.6843399493. The cubic root of 40001632 is about 341.9998404067. Note that the first 3 decimals are identical.

Adding to 40001632 its reverse (23610004), we get a palindrome (63611636).

The spelling of 40001632 in words is "forty million, one thousand, six hundred thirty-two".