261348420 has 48 divisors (see below), whose sum is σ = 770293440. Its totient is φ = 66024576.

The previous prime is 261348419. The next prime is 261348443. The reversal of 261348420 is 24843162.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113487 + ... + 115766.

It is an arithmetic number, because the mean of its divisors is an integer number (16047780).

Almost surely, 2^261348420 is an apocalyptic number.

261348420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261348420 is an abundant number, since it is smaller than the sum of its proper divisors (508945020).

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

261348420 is a wasteful number, since it uses less digits than its factorization.

261348420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229284 (or 229282 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 261348420 is about 16166.2741533107. The cubic root of 261348420 is about 639.3518992561.

The spelling of 261348420 in words is "two hundred sixty-one million, three hundred forty-eight thousand, four hundred twenty".