71039430 has 320 divisors, whose sum is σ = 255923712. Its totient is φ = 13685760.

The previous prime is 71039411. The next prime is 71039431. The reversal of 71039430 is 3493017.

It is a super-2 number, since 2×71039430² = 10093201229449800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71039394 and 71039403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71039431) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1060257 + ... + 1060323.

Almost surely, 2^71039430 is an apocalyptic number.

71039430 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 71039430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127961856).

71039430 is an abundant number, since it is smaller than the sum of its proper divisors (184884282).

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

71039430 is a wasteful number, since it uses less digits than its factorization.

71039430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 71039430 is about 8428.4891884608. The cubic root of 71039430 is about 414.1584144862.

The spelling of 71039430 in words is "seventy-one million, thirty-nine thousand, four hundred thirty".