74787842 has 4 divisors (see below), whose sum is σ = 112181766. Its totient is φ = 37393920.

The previous prime is 74787829. The next prime is 74787859. The reversal of 74787842 is 24878747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24878747 = 983 ⋅25309.

It can be written as a sum of positive squares in only one way, i.e., 63504961 + 11282881 = 7969^2 + 3359^2 .

It is a super-2 number, since 2×74787842² = 11186442622033928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18696959 + ... + 18696962.

Almost surely, 2^74787842 is an apocalyptic number.

74787842 is a deficient number, since it is larger than the sum of its proper divisors (37393924).

74787842 is a wasteful number, since it uses less digits than its factorization.

74787842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37393923.

The product of its digits is 702464, while the sum is 47.

The square root of 74787842 is about 8647.9964153554. The cubic root of 74787842 is about 421.3183104711.

The spelling of 74787842 in words is "seventy-four million, seven hundred eighty-seven thousand, eight hundred forty-two".