61267840 has 32 divisors (see below), whose sum is σ = 146469960. Its totient is φ = 24506880.

The previous prime is 61267831. The next prime is 61267849. The reversal of 61267840 is 4876216.

It is an interprime number because it is at equal distance from previous prime (61267831) and next prime (61267849).

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 61267796 and 61267805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61267849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47226 + ... + 48505.

Almost surely, 2^61267840 is an apocalyptic number.

It is an amenable number.

61267840 is an abundant number, since it is smaller than the sum of its proper divisors (85202120).

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

61267840 is an equidigital number, since it uses as much as digits as its factorization.

61267840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95750 (or 95738 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 61267840 is about 7827.3775940605. The cubic root of 61267840 is about 394.2250254158.

The spelling of 61267840 in words is "sixty-one million, two hundred sixty-seven thousand, eight hundred forty".