73991274 has 64 divisors (see below), whose sum is σ = 174432000. Its totient is φ = 20913984.

The previous prime is 73991243. The next prime is 73991279. The reversal of 73991274 is 47219937.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73991279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322992 + ... + 323220.

It is an arithmetic number, because the mean of its divisors is an integer number (2725500).

Almost surely, 2^73991274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73991274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87216000).

73991274 is an abundant number, since it is smaller than the sum of its proper divisors (100440726).

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

73991274 is a wasteful number, since it uses less digits than its factorization.

73991274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 398 counting only the distinct ones).

The product of its digits is 95256, while the sum is 42.

The square root of 73991274 is about 8601.8180636421. The cubic root of 73991274 is about 419.8171426223.

The spelling of 73991274 in words is "seventy-three million, nine hundred ninety-one thousand, two hundred seventy-four".