690726400 has 240 divisors, whose sum is σ = 2109802464. Its totient is φ = 218234880.

The previous prime is 690726389. The next prime is 690726401. The reversal of 690726400 is 4627096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690726401) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1164504 + ... + 1165096.

Almost surely, 2^690726400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690726400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1054901232).

690726400 is an abundant number, since it is smaller than the sum of its proper divisors (1419076064).

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

690726400 is a wasteful number, since it uses less digits than its factorization.

690726400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 690726400 is about 26281.6742236867. The cubic root of 690726400 is about 883.9655740298.

The spelling of 690726400 in words is "six hundred ninety million, seven hundred twenty-six thousand, four hundred".