39494742 has 16 divisors (see below), whose sum is σ = 90273792. Its totient is φ = 11284200.

The previous prime is 39494731. The next prime is 39494747. The reversal of 39494742 is 24749493.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 940351 = 39494742 / (3 + 9 + 4 + 9 + 4 + 7 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 39494694 and 39494703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39494747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470134 + ... + 470217.

It is an arithmetic number, because the mean of its divisors is an integer number (5642112).

Almost surely, 2^39494742 is an apocalyptic number.

39494742 is an abundant number, since it is smaller than the sum of its proper divisors (50779050).

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

39494742 is a wasteful number, since it uses less digits than its factorization.

39494742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940363.

The product of its digits is 217728, while the sum is 42.

The square root of 39494742 is about 6284.4842270468. The cubic root of 39494742 is about 340.5491184335.

The spelling of 39494742 in words is "thirty-nine million, four hundred ninety-four thousand, seven hundred forty-two".