73361820 has 72 divisors (see below), whose sum is σ = 238959504. Its totient is φ = 16767744.

The previous prime is 73361819. The next prime is 73361843. The reversal of 73361820 is 2816337.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9537 + ... + 15416.

It is an arithmetic number, because the mean of its divisors is an integer number (3318882).

Almost surely, 2^73361820 is an apocalyptic number.

73361820 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

73361820 is an abundant number, since it is smaller than the sum of its proper divisors (165597684).

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

73361820 is a wasteful number, since it uses less digits than its factorization.

73361820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24979 (or 24970 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 73361820 is about 8565.1514872768. The cubic root of 73361820 is about 418.6232698853.

The spelling of 73361820 in words is "seventy-three million, three hundred sixty-one thousand, eight hundred twenty".