1688552950 has 48 divisors (see below), whose sum is σ = 3705191424. Its totient is φ = 560253600.

The previous prime is 1688552941. The next prime is 1688552951. The reversal of 1688552950 is 592558861.

It is a super-2 number, since 2×1688552950² = 5702422129907405000, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1688552894 and 1688552903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688552951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66964 + ... + 88663.

It is an arithmetic number, because the mean of its divisors is an integer number (77191488).

Almost surely, 2^1688552950 is an apocalyptic number.

1688552950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1688552950 is an abundant number, since it is smaller than the sum of its proper divisors (2016638474).

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

1688552950 is a wasteful number, since it uses less digits than its factorization.

1688552950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155677 (or 155672 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 49.

The square root of 1688552950 is about 41092.0059135594. The cubic root of 1688552950 is about 1190.7983602965.

The spelling of 1688552950 in words is "one billion, six hundred eighty-eight million, five hundred fifty-two thousand, nine hundred fifty".