61023040 has 56 divisors (see below), whose sum is σ = 156499560. Its totient is φ = 22530048.

The previous prime is 61023037. The next prime is 61023043. The reversal of 61023040 is 4032016.

It is an interprime number because it is at equal distance from previous prime (61023037) and next prime (61023043).

It can be written as a sum of positive squares in 4 ways, for example, as 2408704 + 58614336 = 1552^2 + 7656^2 .

It is a super-2 number, since 2×61023040² = 7447622821683200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61023043) 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, 3175 + ... + 11494.

It is an arithmetic number, because the mean of its divisors is an integer number (2794635).

Almost surely, 2^61023040 is an apocalyptic number.

It is an amenable number.

61023040 is an abundant number, since it is smaller than the sum of its proper divisors (95476520).

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

61023040 is a wasteful number, since it uses less digits than its factorization.

61023040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14699 (or 14689 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 61023040 is about 7811.7245215125. The cubic root of 61023040 is about 393.6992732166.

Adding to 61023040 its reverse (4032016), we get a palindrome (65055056).

The spelling of 61023040 in words is "sixty-one million, twenty-three thousand, forty".