71263920 has 240 divisors, whose sum is σ = 274482432. Its totient is φ = 14976000.

The previous prime is 71263901. The next prime is 71263931. The reversal of 71263920 is 2936217.

71263920 = T₃₉₇₅ + T₃₉₇₆ + ... + T₃₉₈₃.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283795 + ... + 284045.

Almost surely, 2^71263920 is an apocalyptic number.

71263920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71263920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137241216).

71263920 is an abundant number, since it is smaller than the sum of its proper divisors (203218512).

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

71263920 is a wasteful number, since it uses less digits than its factorization.

71263920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 71263920 is about 8441.7960174361. The cubic root of 71263920 is about 414.5942131154.

The spelling of 71263920 in words is "seventy-one million, two hundred sixty-three thousand, nine hundred twenty".