1212090940 has 24 divisors (see below), whose sum is σ = 2679359760. Its totient is φ = 459318528.

The previous prime is 1212090857. The next prime is 1212090991. The reversal of 1212090940 is 490902121.

It is a happy number.

1212090940 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1212090899 and 1212090908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1594477 + ... + 1595236.

It is an arithmetic number, because the mean of its divisors is an integer number (111639990).

Almost surely, 2^1212090940 is an apocalyptic number.

1212090940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212090940 is an abundant number, since it is smaller than the sum of its proper divisors (1467268820).

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

1212090940 is a wasteful number, since it uses less digits than its factorization.

1212090940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189741 (or 3189739 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1212090940 is about 34815.0964381832. The cubic root of 1212090940 is about 1066.2156880457.

The spelling of 1212090940 in words is "one billion, two hundred twelve million, ninety thousand, nine hundred forty".