1219892040 has 48 divisors (see below), whose sum is σ = 3964650300. Its totient is φ = 325304448.

The previous prime is 1219891997. The next prime is 1219892057. The reversal of 1219892040 is 402989121.

It can be written as a sum of positive squares in 2 ways, for example, as 1219825476 + 66564 = 34926^2 + 258^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1219891986 and 1219892004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1693935 + ... + 1694654.

Almost surely, 2^1219892040 is an apocalyptic number.

1219892040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1219892040 is an abundant number, since it is smaller than the sum of its proper divisors (2744758260).

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

1219892040 is a wasteful number, since it uses less digits than its factorization.

1219892040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388606 (or 3388599 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1219892040 is about 34926.9529160504. The cubic root of 1219892040 is about 1068.4982105116.

The spelling of 1219892040 in words is "one billion, two hundred nineteen million, eight hundred ninety-two thousand, forty".