611969988 has 48 divisors (see below), whose sum is σ = 1634016384. Its totient is φ = 174624000.

The previous prime is 611969987. The next prime is 611969989. The reversal of 611969988 is 889969116.

It is an interprime number because it is at equal distance from previous prime (611969987) and next prime (611969989).

It is a super-3 number, since 3×611969988³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (611969983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67738 + ... + 76238.

It is an arithmetic number, because the mean of its divisors is an integer number (34042008).

Almost surely, 2^611969988 is an apocalyptic number.

It is an amenable number.

611969988 is an abundant number, since it is smaller than the sum of its proper divisors (1022046396).

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

611969988 is a wasteful number, since it uses less digits than its factorization.

611969988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372 (or 9370 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 57.

The square root of 611969988 is about 24738.0271646710. The cubic root of 611969988 is about 849.0045962506.

It can be divided in two parts, 61196998 and 8, that multiplied together give a palindrome (489575984).

The spelling of 611969988 in words is "six hundred eleven million, nine hundred sixty-nine thousand, nine hundred eighty-eight".