1213672544 has 24 divisors (see below), whose sum is σ = 2730763728. Its totient is φ = 520145280.

The previous prime is 1213672501. The next prime is 1213672547. The reversal of 1213672544 is 4452763121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213672547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2708867 + ... + 2709314.

It is an arithmetic number, because the mean of its divisors is an integer number (113781822).

Almost surely, 2^1213672544 is an apocalyptic number.

1213672544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1213672544 is an abundant number, since it is smaller than the sum of its proper divisors (1517091184).

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

1213672544 is an equidigital number, since it uses as much as digits as its factorization.

1213672544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5418198 (or 5418190 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 1213672544 is about 34837.8033750694. The cubic root of 1213672544 is about 1066.6792390879.

The spelling of 1213672544 in words is "one billion, two hundred thirteen million, six hundred seventy-two thousand, five hundred forty-four".