40428742 has 8 divisors (see below), whose sum is σ = 61933536. Its totient is φ = 19784232.

The previous prime is 40428721. The next prime is 40428757. The reversal of 40428742 is 24782404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 214953 + ... + 215140.

It is an arithmetic number, because the mean of its divisors is an integer number (7741692).

Almost surely, 2^40428742 is an apocalyptic number.

40428742 is a deficient number, since it is larger than the sum of its proper divisors (21504794).

40428742 is a wasteful number, since it uses less digits than its factorization.

40428742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430142.

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 40428742 is about 6358.3600086815. The cubic root of 40428742 is about 343.2127470031.

The spelling of 40428742 in words is "forty million, four hundred twenty-eight thousand, seven hundred forty-two".