71402730 has 64 divisors (see below), whose sum is σ = 200648448. Its totient is φ = 15920640.

The previous prime is 71402707. The next prime is 71402731. The reversal of 71402730 is 3720417.

It is a self number, because there is not a number n which added to its sum of digits gives 71402730.

It is not an unprimeable number, because it can be changed into a prime (71402731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4464 + ... + 12756.

It is an arithmetic number, because the mean of its divisors is an integer number (3135132).

Almost surely, 2^71402730 is an apocalyptic number.

71402730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 71402730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100324224).

71402730 is an abundant number, since it is smaller than the sum of its proper divisors (129245718).

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

71402730 is a wasteful number, since it uses less digits than its factorization.

71402730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8351.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 71402730 is about 8450.0136094565. The cubic root of 71402730 is about 414.8632248741.

It can be divided in two parts, 7140 and 2730, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 71402730 in words is "seventy-one million, four hundred two thousand, seven hundred thirty".