1212047390 has 32 divisors (see below), whose sum is σ = 2237388480. Its totient is φ = 472595200.

The previous prime is 1212047339. The next prime is 1212047401. The reversal of 1212047390 is 937402121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53600 + ... + 72780.

It is an arithmetic number, because the mean of its divisors is an integer number (69918390).

Almost surely, 2^1212047390 is an apocalyptic number.

1212047390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212047390 is a deficient number, since it is larger than the sum of its proper divisors (1025341090).

1212047390 is a wasteful number, since it uses less digits than its factorization.

1212047390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19348.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1212047390 is about 34814.4709854968. The cubic root of 1212047390 is about 1066.2029183083.

The spelling of 1212047390 in words is "one billion, two hundred twelve million, forty-seven thousand, three hundred ninety".