299349840 has 40 divisors (see below), whose sum is σ = 927985248. Its totient is φ = 79826560.

The previous prime is 299349839. The next prime is 299349847. The reversal of 299349840 is 48943992.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×299349840² = 179220653416051200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 299349840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (299349847) 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, 623406 + ... + 623885.

Almost surely, 2^299349840 is an apocalyptic number.

299349840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

299349840 is an abundant number, since it is smaller than the sum of its proper divisors (628635408).

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

299349840 is a wasteful number, since it uses less digits than its factorization.

299349840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247307 (or 1247301 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 299349840 is about 17301.7293933294. The cubic root of 299349840 is about 668.9490019463.

The spelling of 299349840 in words is "two hundred ninety-nine million, three hundred forty-nine thousand, eight hundred forty".