1234566690 has 64 divisors (see below), whose sum is σ = 3585441024. Its totient is φ = 265586688.

The previous prime is 1234566677. The next prime is 1234566691. The reversal of 1234566690 is 966654321.

It is a super-2 number, since 2×1234566690² = 3048309824115112200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1234566691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169339 + ... + 176478.

It is an arithmetic number, because the mean of its divisors is an integer number (56022516).

Almost surely, 2^1234566690 is an apocalyptic number.

1234566690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1234566690 is an abundant number, since it is smaller than the sum of its proper divisors (2350874334).

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

1234566690 is a wasteful number, since it uses less digits than its factorization.

1234566690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345851.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 1234566690 is about 35136.4012101410. The cubic root of 1234566690 is about 1072.7656320648.

The spelling of 1234566690 in words is "one billion, two hundred thirty-four million, five hundred sixty-six thousand, six hundred ninety".