61949020 has 48 divisors (see below), whose sum is σ = 157429440. Its totient is φ = 19989504.

The previous prime is 61949011. The next prime is 61949033. The reversal of 61949020 is 2094916.

61949020 = T₅ + T₆ + ... + T₇₁₈.

It is a happy number.

It is a congruent number.

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, 10635 + ... + 15394.

It is an arithmetic number, because the mean of its divisors is an integer number (3279780).

Almost surely, 2^61949020 is an apocalyptic number.

It is an amenable number.

61949020 is an abundant number, since it is smaller than the sum of its proper divisors (95480420).

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

61949020 is a wasteful number, since it uses less digits than its factorization.

61949020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26062 (or 26060 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 61949020 is about 7870.7699750406. The cubic root of 61949020 is about 395.6806509450.

The spelling of 61949020 in words is "sixty-one million, nine hundred forty-nine thousand, twenty".