73621380 has 96 divisors (see below), whose sum is σ = 239662080. Its totient is φ = 16536960.

The previous prime is 73621369. The next prime is 73621381. The reversal of 73621380 is 8312637.

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 (73621381) 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 31 ways as a sum of consecutive naturals, for example, 23295 + ... + 26265.

It is an arithmetic number, because the mean of its divisors is an integer number (2496480).

Almost surely, 2^73621380 is an apocalyptic number.

73621380 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73621380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119831040).

73621380 is an abundant number, since it is smaller than the sum of its proper divisors (166040700).

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

73621380 is a wasteful number, since it uses less digits than its factorization.

73621380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049 (or 3047 counting only the distinct ones).

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

The square root of 73621380 is about 8580.2902048824. The cubic root of 73621380 is about 419.1163963303.

The spelling of 73621380 in words is "seventy-three million, six hundred twenty-one thousand, three hundred eighty".