73561390 has 32 divisors (see below), whose sum is σ = 154851840. Its totient is φ = 24633504.

The previous prime is 73561381. The next prime is 73561391. The reversal of 73561390 is 9316537.

It is a super-2 number, since 2×73561390² = 10822556197464200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73561391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9210 + ... + 15229.

It is an arithmetic number, because the mean of its divisors is an integer number (4839120).

Almost surely, 2^73561390 is an apocalyptic number.

73561390 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

73561390 is an abundant number, since it is smaller than the sum of its proper divisors (81290450).

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

73561390 is a wasteful number, since it uses less digits than its factorization.

73561390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24496.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 73561390 is about 8576.7936899520. The cubic root of 73561390 is about 419.0025271216.

The spelling of 73561390 in words is "seventy-three million, five hundred sixty-one thousand, three hundred ninety".