74390739 has 8 divisors (see below), whose sum is σ = 100302480. Its totient is φ = 49036416.

The previous prime is 74390737. The next prime is 74390741. The reversal of 74390739 is 93709347.

It is an interprime number because it is at equal distance from previous prime (74390737) and next prime (74390741).

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

It is not a de Polignac number, because 74390739 - 2¹ = 74390737 is a prime.

It is a super-2 number, since 2×74390739² = 11067964097932242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74390739.

It is not an unprimeable number, because it can be changed into a prime (74390737) 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, 139042 + ... + 139575.

It is an arithmetic number, because the mean of its divisors is an integer number (12537810).

Almost surely, 2^74390739 is an apocalyptic number.

74390739 is a deficient number, since it is larger than the sum of its proper divisors (25911741).

74390739 is a wasteful number, since it uses less digits than its factorization.

74390739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278709.

The product of its (nonzero) digits is 142884, while the sum is 42.

The square root of 74390739 is about 8625.0066086931. The cubic root of 74390739 is about 420.5712917271.

The spelling of 74390739 in words is "seventy-four million, three hundred ninety thousand, seven hundred thirty-nine".