40142748 has 12 divisors (see below), whose sum is σ = 93666440. Its totient is φ = 13380912.

The previous prime is 40142717. The next prime is 40142749. The reversal of 40142748 is 84724104.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×40142748² = 3222880433983008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40142749) 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, 1672603 + ... + 1672626.

Almost surely, 2^40142748 is an apocalyptic number.

It is an amenable number.

40142748 is an abundant number, since it is smaller than the sum of its proper divisors (53523692).

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

40142748 is a wasteful number, since it uses less digits than its factorization.

40142748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345236 (or 3345234 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 40142748 is about 6335.8304901568. The cubic root of 40142748 is about 342.4015324232.

The spelling of 40142748 in words is "forty million, one hundred forty-two thousand, seven hundred forty-eight".