356428981 has 4 divisors (see below), whose sum is σ = 356544832. Its totient is φ = 356313132.

The previous prime is 356428973. The next prime is 356428993. The reversal of 356428981 is 189824653.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189824653 = 59 ⋅3217367.

It is a cyclic number.

It is not a de Polignac number, because 356428981 - 2³ = 356428973 is a prime.

It is a super-2 number, since 2×356428981² = 254083236993396722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (356428951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53181 + ... + 59506.

It is an arithmetic number, because the mean of its divisors is an integer number (89136208).

Almost surely, 2^356428981 is an apocalyptic number.

It is an amenable number.

356428981 is a deficient number, since it is larger than the sum of its proper divisors (115851).

356428981 is a wasteful number, since it uses less digits than its factorization.

356428981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115850.

The product of its digits is 414720, while the sum is 46.

The square root of 356428981 is about 18879.3268153290. The cubic root of 356428981 is about 709.0186674112.

The spelling of 356428981 in words is "three hundred fifty-six million, four hundred twenty-eight thousand, nine hundred eighty-one".