71451390 has 32 divisors (see below), whose sum is σ = 173093760. Its totient is φ = 18874784.

The previous prime is 71451371. The next prime is 71451407. The reversal of 71451390 is 9315417.

It is a super-2 number, since 2×71451390² = 10210602265864200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7920 + ... + 14339.

It is an arithmetic number, because the mean of its divisors is an integer number (5409180).

Almost surely, 2^71451390 is an apocalyptic number.

71451390 is an abundant number, since it is smaller than the sum of its proper divisors (101642370).

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

71451390 is a wasteful number, since it uses less digits than its factorization.

71451390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22376.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 71451390 is about 8452.8924043785. The cubic root of 71451390 is about 414.9574447098.

The spelling of 71451390 in words is "seventy-one million, four hundred fifty-one thousand, three hundred ninety".