71420064 has 48 divisors (see below), whose sum is σ = 192554208. Its totient is φ = 23162112.

The previous prime is 71420059. The next prime is 71420087. The reversal of 71420064 is 46002417.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 6502 + ... + 13605.

It is an arithmetic number, because the mean of its divisors is an integer number (4011546).

Almost surely, 2^71420064 is an apocalyptic number.

71420064 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

71420064 is an abundant number, since it is smaller than the sum of its proper divisors (121134144).

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

71420064 is a wasteful number, since it uses less digits than its factorization.

71420064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20157 (or 20149 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 71420064 is about 8451.0392260361. The cubic root of 71420064 is about 414.8967934192.

The spelling of 71420064 in words is "seventy-one million, four hundred twenty thousand, sixty-four".