1194497640 has 384 divisors, whose sum is σ = 4763266560. Its totient is φ = 253642752.

The previous prime is 1194497627. The next prime is 1194497659. The reversal of 1194497640 is 467944911.

1194497640 is a `hidden beast` number, since 11 + 94 + 497 + 64 + 0 = 666.

It is a super-2 number, since 2×1194497640² = 2853649223931139200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2144242 + ... + 2144798.

It is an arithmetic number, because the mean of its divisors is an integer number (12404340).

Almost surely, 2^1194497640 is an apocalyptic number.

1194497640 is a gapful number since it is divisible by the number (10) 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 1194497640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2381633280).

1194497640 is an abundant number, since it is smaller than the sum of its proper divisors (3568768920).

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

1194497640 is a wasteful number, since it uses less digits than its factorization.

1194497640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1194497640 is about 34561.5051755562. The cubic root of 1194497640 is about 1061.0318775746.

The spelling of 1194497640 in words is "one billion, one hundred ninety-four million, four hundred ninety-seven thousand, six hundred forty".