1616928858 has 16 divisors (see below), whose sum is σ = 3593175360. Its totient is φ = 538976268.

The previous prime is 1616928857. The next prime is 1616928883. The reversal of 1616928858 is 8588296161.

It is a happy number.

It is a super-2 number, since 2×1616928858² = 5228917863666368328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 29943127 = 1616928858 / (1 + 6 + 1 + 6 + 9 + 2 + 8 + 8 + 5 + 8).

It is not an unprimeable number, because it can be changed into a prime (1616928857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14971510 + ... + 14971617.

It is an arithmetic number, because the mean of its divisors is an integer number (224573460).

Almost surely, 2^1616928858 is an apocalyptic number.

1616928858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1616928858 is an abundant number, since it is smaller than the sum of its proper divisors (1976246502).

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

1616928858 is a wasteful number, since it uses less digits than its factorization.

1616928858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29943138 (or 29943132 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The square root of 1616928858 is about 40211.0539279935. The cubic root of 1616928858 is about 1173.7176553061.

The spelling of 1616928858 in words is "one billion, six hundred sixteen million, nine hundred twenty-eight thousand, eight hundred fifty-eight".