73147780 has 24 divisors (see below), whose sum is σ = 154788480. Its totient is φ = 29034720.

The previous prime is 73147757. The next prime is 73147793. The reversal of 73147780 is 8774137.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11340 + ... + 16579.

It is an arithmetic number, because the mean of its divisors is an integer number (6449520).

Almost surely, 2^73147780 is an apocalyptic number.

It is an amenable number.

73147780 is an abundant number, since it is smaller than the sum of its proper divisors (81640700).

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

73147780 is a wasteful number, since it uses less digits than its factorization.

73147780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28059 (or 28057 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 73147780 is about 8552.6475433049. The cubic root of 73147780 is about 418.2157490656.

The spelling of 73147780 in words is "seventy-three million, one hundred forty-seven thousand, seven hundred eighty".