609687540 has 576 divisors, whose sum is σ = 2516828160. Its totient is φ = 119750400.

The previous prime is 609687521. The next prime is 609687553. The reversal of 609687540 is 45786906.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14178759 + ... + 14178801.

Almost surely, 2^609687540 is an apocalyptic number.

609687540 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 609687540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1258414080).

609687540 is an abundant number, since it is smaller than the sum of its proper divisors (1907140620).

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

609687540 is a wasteful number, since it uses less digits than its factorization.

609687540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 609687540 is about 24691.8516924106. The cubic root of 609687540 is about 847.9477780972.

It can be divided in two parts, 6096 and 87540, that added together give a square (93636 = 306²).

The spelling of 609687540 in words is "six hundred nine million, six hundred eighty-seven thousand, five hundred forty".