1213888950 has 48 divisors (see below), whose sum is σ = 3344942160. Its totient is φ = 323703360.

The previous prime is 1213888939. The next prime is 1213888969. The reversal of 1213888950 is 598883121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1213888896 and 1213888905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 448239 + ... + 450938.

It is an arithmetic number, because the mean of its divisors is an integer number (69686295).

Almost surely, 2^1213888950 is an apocalyptic number.

1213888950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213888950 is an abundant number, since it is smaller than the sum of its proper divisors (2131053210).

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

1213888950 is a wasteful number, since it uses less digits than its factorization.

1213888950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899198 (or 899187 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 1213888950 is about 34840.9091442804. The cubic root of 1213888950 is about 1066.7426340209.

The spelling of 1213888950 in words is "one billion, two hundred thirteen million, eight hundred eighty-eight thousand, nine hundred fifty".