1305498730 has 32 divisors (see below), whose sum is σ = 2377340928. Its totient is φ = 516120000.

The previous prime is 1305498679. The next prime is 1305498739. The reversal of 1305498730 is 378945031.

It is a super-2 number, since 2×1305498730² = 3408653868063225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1305498739) 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, 1133655 + ... + 1134805.

It is an arithmetic number, because the mean of its divisors is an integer number (74291904).

Almost surely, 2^1305498730 is an apocalyptic number.

1305498730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1305498730 is a deficient number, since it is larger than the sum of its proper divisors (1071842198).

1305498730 is a wasteful number, since it uses less digits than its factorization.

1305498730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1305498730 is about 36131.6859556816. The cubic root of 1305498730 is about 1092.9295069671.

The spelling of 1305498730 in words is "one billion, three hundred five million, four hundred ninety-eight thousand, seven hundred thirty".