71478780 has 24 divisors (see below), whose sum is σ = 200140752. Its totient is φ = 19060992.

The previous prime is 71478769. The next prime is 71478809. The reversal of 71478780 is 8787417.

It is a congruent number.

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, 595597 + ... + 595716.

It is an arithmetic number, because the mean of its divisors is an integer number (8339198).

Almost surely, 2^71478780 is an apocalyptic number.

It is an amenable number.

71478780 is an abundant number, since it is smaller than the sum of its proper divisors (128661972).

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

71478780 is a wasteful number, since it uses less digits than its factorization.

71478780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191325 (or 1191323 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 42.

The square root of 71478780 is about 8454.5124046275. The cubic root of 71478780 is about 415.0104608579.

The spelling of 71478780 in words is "seventy-one million, four hundred seventy-eight thousand, seven hundred eighty".