71842480 has 40 divisors (see below), whose sum is σ = 167400000. Its totient is φ = 28674048.

The previous prime is 71842457. The next prime is 71842481. The reversal of 71842480 is 8424817.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×71842480² = 10322683865100800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71842481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56896 + ... + 58144.

It is an arithmetic number, because the mean of its divisors is an integer number (4185000).

Almost surely, 2^71842480 is an apocalyptic number.

It is an amenable number.

71842480 is an abundant number, since it is smaller than the sum of its proper divisors (95557520).

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

71842480 is a wasteful number, since it uses less digits than its factorization.

71842480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981 (or 1975 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 71842480 is about 8475.9943369495. The cubic root of 71842480 is about 415.7131590178.

The spelling of 71842480 in words is "seventy-one million, eight hundred forty-two thousand, four hundred eighty".