61263020 has 96 divisors (see below), whose sum is σ = 162400896. Its totient is φ = 18892800.

The previous prime is 61263017. The next prime is 61263029. The reversal of 61263020 is 2036216.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 61262983 and 61263001.

It is not an unprimeable number, because it can be changed into a prime (61263029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74210 + ... + 75030.

It is an arithmetic number, because the mean of its divisors is an integer number (1691676).

Almost surely, 2^61263020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61263020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81200448).

61263020 is an abundant number, since it is smaller than the sum of its proper divisors (101137876).

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

61263020 is a wasteful number, since it uses less digits than its factorization.

61263020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 61263020 is about 7827.0696943364. The cubic root of 61263020 is about 394.2146871238.

Adding to 61263020 its reverse (2036216), we get a palindrome (63299236).

The spelling of 61263020 in words is "sixty-one million, two hundred sixty-three thousand, twenty".