1219496540 has 12 divisors (see below), whose sum is σ = 2560942776. Its totient is φ = 487798608.

The previous prime is 1219496539. The next prime is 1219496561. The reversal of 1219496540 is 456949121.

It is a super-2 number, since 2×1219496540² = 2974343622143943200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30487394 + ... + 30487433.

It is an arithmetic number, because the mean of its divisors is an integer number (213411898).

Almost surely, 2^1219496540 is an apocalyptic number.

1219496540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1219496540 is an abundant number, since it is smaller than the sum of its proper divisors (1341446236).

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

1219496540 is a wasteful number, since it uses less digits than its factorization.

1219496540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60974836 (or 60974834 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1219496540 is about 34921.2906405247. The cubic root of 1219496540 is about 1068.3827257785.

The spelling of 1219496540 in words is "one billion, two hundred nineteen million, four hundred ninety-six thousand, five hundred forty".