1212164490 has 64 divisors (see below), whose sum is σ = 2939763456. Its totient is φ = 319867392.

The previous prime is 1212164483. The next prime is 1212164507. The reversal of 1212164490 is 944612121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1567744 + ... + 1568516.

It is an arithmetic number, because the mean of its divisors is an integer number (45933804).

Almost surely, 2^1212164490 is an apocalyptic number.

1212164490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212164490 is an abundant number, since it is smaller than the sum of its proper divisors (1727598966).

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

1212164490 is a wasteful number, since it uses less digits than its factorization.

1212164490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1212164490 is about 34816.1527168066. The cubic root of 1212164490 is about 1066.2372536932.

The spelling of 1212164490 in words is "one billion, two hundred twelve million, one hundred sixty-four thousand, four hundred ninety".