73228420 has 12 divisors (see below), whose sum is σ = 153779724. Its totient is φ = 29291360.

The previous prime is 73228409. The next prime is 73228423. The reversal of 73228420 is 2482237.

It can be written as a sum of positive squares in 2 ways, for example, as 22505536 + 50722884 = 4744^2 + 7122^2 .

It is not an unprimeable number, because it can be changed into a prime (73228423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1830691 + ... + 1830730.

It is an arithmetic number, because the mean of its divisors is an integer number (12814977).

Almost surely, 2^73228420 is an apocalyptic number.

It is an amenable number.

73228420 is an abundant number, since it is smaller than the sum of its proper divisors (80551304).

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

73228420 is a wasteful number, since it uses less digits than its factorization.

73228420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661430 (or 3661428 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 73228420 is about 8557.3605743827. The cubic root of 73228420 is about 418.3693765692.

The spelling of 73228420 in words is "seventy-three million, two hundred twenty-eight thousand, four hundred twenty".