1213628508 has 36 divisors (see below), whose sum is σ = 3181407320. Its totient is φ = 404542512.

The previous prime is 1213628497. The next prime is 1213628519. The reversal of 1213628508 is 8058263121.

It is a happy number.

1213628508 is a `hidden beast` number, since 1 + 21 + 3 + 628 + 5 + 0 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1213628497) and next prime (1213628519).

It is a tau number, because it is divible by the number of its divisors (36).

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

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 11 ways as a sum of consecutive naturals, for example, 623323 + ... + 625266.

Almost surely, 2^1213628508 is an apocalyptic number.

1213628508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1213628508 is an abundant number, since it is smaller than the sum of its proper divisors (1967778812).

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

1213628508 is a wasteful number, since it uses less digits than its factorization.

1213628508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248608 (or 1248594 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1213628508 is about 34837.1713547469. The cubic root of 1213628508 is about 1066.6663380641. Note that the first 3 decimals are identical.

The spelling of 1213628508 in words is "one billion, two hundred thirteen million, six hundred twenty-eight thousand, five hundred eight".