73261290 has 32 divisors (see below), whose sum is σ = 177391296. Its totient is φ = 19362560.

The previous prime is 73261289. The next prime is 73261291. The reversal of 73261290 is 9216237.

It is an interprime number because it is at equal distance from previous prime (73261289) and next prime (73261291).

It is a super-2 number, since 2×73261290² = 10734433224928200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (73261291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7416 + ... + 14195.

It is an arithmetic number, because the mean of its divisors is an integer number (5543478).

Almost surely, 2^73261290 is an apocalyptic number.

73261290 is an abundant number, since it is smaller than the sum of its proper divisors (104130006).

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

73261290 is a wasteful number, since it uses less digits than its factorization.

73261290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21734.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 73261290 is about 8559.2809277415. The cubic root of 73261290 is about 418.4319649483.

The spelling of 73261290 in words is "seventy-three million, two hundred sixty-one thousand, two hundred ninety".