40268728 has 16 divisors (see below), whose sum is σ = 77545080. Its totient is φ = 19590048.

The previous prime is 40268713. The next prime is 40268729. The reversal of 40268728 is 82786204.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40268729) 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, 67726 + ... + 68317.

Almost surely, 2^40268728 is an apocalyptic number.

It is an amenable number.

40268728 is a deficient number, since it is larger than the sum of its proper divisors (37276352).

40268728 is a wasteful number, since it uses less digits than its factorization.

40268728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136086 (or 136082 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 40268728 is about 6345.7645717439. The cubic root of 40268728 is about 342.7593446591.

The spelling of 40268728 in words is "forty million, two hundred sixty-eight thousand, seven hundred twenty-eight".