73446021 has 64 divisors (see below), whose sum is σ = 124692480. Its totient is φ = 42865200.

The previous prime is 73446011. The next prime is 73446041. The reversal of 73446021 is 12064437.

It is not a de Polignac number, because 73446021 - 2⁵ = 73445989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73446011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1034416 + ... + 1034486.

It is an arithmetic number, because the mean of its divisors is an integer number (1948320).

Almost surely, 2^73446021 is an apocalyptic number.

73446021 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

73446021 is a deficient number, since it is larger than the sum of its proper divisors (51246459).

73446021 is an equidigital number, since it uses as much as digits as its factorization.

73446021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 73446021 is about 8570.0654023175. The cubic root of 73446021 is about 418.7833668815.

The spelling of 73446021 in words is "seventy-three million, four hundred forty-six thousand, twenty-one".