71772380 has 12 divisors (see below), whose sum is σ = 150722040. Its totient is φ = 28708944.

The previous prime is 71772353. The next prime is 71772391. The reversal of 71772380 is 8327717.

It is a self number, because there is not a number n which added to its sum of digits gives 71772380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1794290 + ... + 1794329.

It is an arithmetic number, because the mean of its divisors is an integer number (12560170).

Almost surely, 2^71772380 is an apocalyptic number.

It is an amenable number.

71772380 is an abundant number, since it is smaller than the sum of its proper divisors (78949660).

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

71772380 is a wasteful number, since it uses less digits than its factorization.

71772380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588628 (or 3588626 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 71772380 is about 8471.8581196807. The cubic root of 71772380 is about 415.5779048905.

The spelling of 71772380 in words is "seventy-one million, seven hundred seventy-two thousand, three hundred eighty".