74937780 has 72 divisors (see below), whose sum is σ = 228114432. Its totient is φ = 19912896.

The previous prime is 74937763. The next prime is 74937781. The reversal of 74937780 is 8773947.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74937781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68397 + ... + 69483.

It is an arithmetic number, because the mean of its divisors is an integer number (3168256).

Almost surely, 2^74937780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74937780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114057216).

74937780 is an abundant number, since it is smaller than the sum of its proper divisors (153176652).

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

74937780 is a wasteful number, since it uses less digits than its factorization.

74937780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485 (or 1480 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 74937780 is about 8656.6610191228. The cubic root of 74937780 is about 421.5996817639.

The spelling of 74937780 in words is "seventy-four million, nine hundred thirty-seven thousand, seven hundred eighty".