71436780 has 36 divisors (see below), whose sum is σ = 216692112. Its totient is φ = 19049760.

The previous prime is 71436769. The next prime is 71436791. The reversal of 71436780 is 8763417.

It is an interprime number because it is at equal distance from previous prime (71436769) and next prime (71436791).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198256 + ... + 198615.

Almost surely, 2^71436780 is an apocalyptic number.

It is an amenable number.

71436780 is an abundant number, since it is smaller than the sum of its proper divisors (145255332).

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

71436780 is a wasteful number, since it uses less digits than its factorization.

71436780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396886 (or 396881 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 71436780 is about 8452.0281589687. The cubic root of 71436780 is about 414.9291600185.

The spelling of 71436780 in words is "seventy-one million, four hundred thirty-six thousand, seven hundred eighty".