261624430 has 32 divisors (see below), whose sum is σ = 481396608. Its totient is φ = 102336000.

The previous prime is 261624413. The next prime is 261624437. The reversal of 261624430 is 34426162.

261624430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261624437) 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, 211915 + ... + 213145.

It is an arithmetic number, because the mean of its divisors is an integer number (15043644).

Almost surely, 2^261624430 is an apocalyptic number.

261624430 is a deficient number, since it is larger than the sum of its proper divisors (219772178).

261624430 is a wasteful number, since it uses less digits than its factorization.

261624430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 261624430 is about 16174.8084996392. The cubic root of 261624430 is about 639.5768931954.

The spelling of 261624430 in words is "two hundred sixty-one million, six hundred twenty-four thousand, four hundred thirty".