61457400 has 192 divisors, whose sum is σ = 223200000. Its totient is φ = 15500160.

The previous prime is 61457399. The next prime is 61457411. The reversal of 61457400 is 475416.

61457400 is a `hidden beast` number, since 614 + 5 + 7 + 40 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102301 + ... + 102899.

It is an arithmetic number, because the mean of its divisors is an integer number (1162500).

Almost surely, 2^61457400 is an apocalyptic number.

61457400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61457400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111600000).

61457400 is an abundant number, since it is smaller than the sum of its proper divisors (161742600).

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

61457400 is a wasteful number, since it uses less digits than its factorization.

61457400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 61457400 is about 7839.4770233734. The cubic root of 61457400 is about 394.6311784552.

The spelling of 61457400 in words is "sixty-one million, four hundred fifty-seven thousand, four hundred".