691926480 has 480 divisors, whose sum is σ = 2852388864. Its totient is φ = 146893824.

The previous prime is 691926467. The next prime is 691926481. The reversal of 691926480 is 84629196.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691926481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5448177 + ... + 5448303.

Almost surely, 2^691926480 is an apocalyptic number.

691926480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691926480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1426194432).

691926480 is an abundant number, since it is smaller than the sum of its proper divisors (2160462384).

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

691926480 is a wasteful number, since it uses less digits than its factorization.

691926480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 691926480 is about 26304.4954332905. The cubic root of 691926480 is about 884.4772168600.

The spelling of 691926480 in words is "six hundred ninety-one million, nine hundred twenty-six thousand, four hundred eighty".