1098945456 has 40 divisors (see below), whose sum is σ = 3244506624. Its totient is φ = 313984320.

The previous prime is 1098945437. The next prime is 1098945479. The reversal of 1098945456 is 6545498901.

It is a super-2 number, since 2×1098945456² = 2415362230526095872, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1098945399 and 1098945408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1635000 + ... + 1635671.

Almost surely, 2^1098945456 is an apocalyptic number.

1098945456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1098945456 is an abundant number, since it is smaller than the sum of its proper divisors (2145561168).

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

1098945456 is a wasteful number, since it uses less digits than its factorization.

1098945456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270689 (or 3270683 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 1098945456 is about 33150.3462425357. The cubic root of 1098945456 is about 1031.9501358035.

The spelling of 1098945456 in words is "one billion, ninety-eight million, nine hundred forty-five thousand, four hundred fifty-six".