261403674 has 16 divisors (see below), whose sum is σ = 597494208. Its totient is φ = 74686752.

The previous prime is 261403673. The next prime is 261403711. The reversal of 261403674 is 476304162.

It is a happy number.

261403674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261403673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3111907 + ... + 3111990.

It is an arithmetic number, because the mean of its divisors is an integer number (37343388).

Almost surely, 2^261403674 is an apocalyptic number.

261403674 is an abundant number, since it is smaller than the sum of its proper divisors (336090534).

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

261403674 is a wasteful number, since it uses less digits than its factorization.

261403674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223909.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 261403674 is about 16167.9829910846. The cubic root of 261403674 is about 639.3969531099.

The spelling of 261403674 in words is "two hundred sixty-one million, four hundred three thousand, six hundred seventy-four".