74157390 has 64 divisors (see below), whose sum is σ = 198515520. Its totient is φ = 19699200.

The previous prime is 74157389. The next prime is 74157401. The reversal of 74157390 is 9375147.

It is a happy number.

It is a super-2 number, since 2×74157390² = 10998636983224200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123090 + ... + 123690.

It is an arithmetic number, because the mean of its divisors is an integer number (3101805).

Almost surely, 2^74157390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74157390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99257760).

74157390 is an abundant number, since it is smaller than the sum of its proper divisors (124358130).

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

74157390 is a wasteful number, since it uses less digits than its factorization.

74157390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 74157390 is about 8611.4685158804. The cubic root of 74157390 is about 420.1310815343.

It can be divided in two parts, 74157 and 390, that added together give a palindrome (74547).

The spelling of 74157390 in words is "seventy-four million, one hundred fifty-seven thousand, three hundred ninety".