1047228861 has 16 divisors (see below), whose sum is σ = 1602814464. Its totient is φ = 595777584.

The previous prime is 1047228839. The next prime is 1047228863. The reversal of 1047228861 is 1688227401.

It is a happy number.

It is not a de Polignac number, because 1047228861 - 2²¹ = 1045131709 is a prime.

It is a super-2 number, since 2×1047228861² = 2193376574622714642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047228863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105075 + ... + 114608.

It is an arithmetic number, because the mean of its divisors is an integer number (100175904).

Almost surely, 2^1047228861 is an apocalyptic number.

It is an amenable number.

1047228861 is a deficient number, since it is larger than the sum of its proper divisors (555585603).

1047228861 is a wasteful number, since it uses less digits than its factorization.

1047228861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219920.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 1047228861 is about 32360.9156390854. The cubic root of 1047228861 is about 1015.5014180720.

The spelling of 1047228861 in words is "one billion, forty-seven million, two hundred twenty-eight thousand, eight hundred sixty-one".