618456428 has 6 divisors (see below), whose sum is σ = 1082298756. Its totient is φ = 309228212.

The previous prime is 618456427. The next prime is 618456437. The reversal of 618456428 is 824654816.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (618456427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77307050 + ... + 77307057.

It is an arithmetic number, because the mean of its divisors is an integer number (180383126).

Almost surely, 2^618456428 is an apocalyptic number.

It is an amenable number.

618456428 is a deficient number, since it is larger than the sum of its proper divisors (463842328).

618456428 is a wasteful number, since it uses less digits than its factorization.

618456428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154614111 (or 154614109 counting only the distinct ones).

The product of its digits is 368640, while the sum is 44.

The square root of 618456428 is about 24868.7842083203. The cubic root of 618456428 is about 851.9936722109.

The spelling of 618456428 in words is "six hundred eighteen million, four hundred fifty-six thousand, four hundred twenty-eight".