307420290 has 24 divisors (see below), whose sum is σ = 799292988. Its totient is φ = 81978720.

The previous prime is 307420249. The next prime is 307420291. The reversal of 307420290 is 92024703.

It can be written as a sum of positive squares in 2 ways, for example, as 307265841 + 154449 = 17529^2 + 393^2 .

It is not an unprimeable number, because it can be changed into a prime (307420291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1707801 + ... + 1707980.

Almost surely, 2^307420290 is an apocalyptic number.

307420290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

307420290 is an abundant number, since it is smaller than the sum of its proper divisors (491872698).

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

307420290 is a wasteful number, since it uses less digits than its factorization.

307420290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3415794 (or 3415791 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 307420290 is about 17533.4049745051. The cubic root of 307420290 is about 674.9073782378.

Adding to 307420290 its reverse (92024703), we get a palindrome (399444993).

The spelling of 307420290 in words is "three hundred seven million, four hundred twenty thousand, two hundred ninety".