81614290 has 8 divisors (see below), whose sum is σ = 146905740. Its totient is φ = 32645712.

The previous prime is 81614257. The next prime is 81614293. The reversal of 81614290 is 9241618.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75116889 + 6497401 = 8667^2 + 2549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (81614293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4080705 + ... + 4080724.

Almost surely, 2^81614290 is an apocalyptic number.

81614290 is a deficient number, since it is larger than the sum of its proper divisors (65291450).

81614290 is a wasteful number, since it uses less digits than its factorization.

81614290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161436.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 81614290 is about 9034.0627626777. The cubic root of 81614290 is about 433.7658948240.

The spelling of 81614290 in words is "eighty-one million, six hundred fourteen thousand, two hundred ninety".